Horseshoe-machine



PATENTED Nov. 1 3, 1860; J; MOGARTY.v MACHINE POR BENDING BARS PoR 'HoRsBsHoEs-l UNITED STATES PATENT OFFICE. i

JOHN MCCARTY., OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO LEYFERT, MCMANUS &

CO., OF READING, PENNSYLVANIA.

HORSESHOE-MACHINE.

To all whom it may concern:

Be it known that I, JOHN MCOARTY, of the cityq and county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Machinery for Bending Bars for I-Iorseshoes; and I do h-ereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon.

My invention relates to machinery for eutting and bending bars of iron to be formed into horse shoes and my invention consists, firstly, in a stripper operated by a reciproeating carriage in a peculiar manner described hereafter so as to force the bent bar from a former attached to the said carriage; secondly, in a certain device for maintaining the stripper in a vertical position during its movements, without the aid of guides; thirdly, in a combination of the stripper the former and a projection on the frame described hereafter, for the purpose of resisting the pressure exerted on the former by the stripper.

yIn order to enable others skilled in the art to make and use my invention I will now proceed to describe its construction and op eration.

On reference to the accompanying drawing which forms a part of this specihcation, Figure l is an end view of my improved machine for forming horse shoes, Fig. 2 a longitudinal vertical section, Fig. 3 a ground plan, Fig. 4: a detached view showing the end of one of the levers, and Fig. 5 a view of the bar bent by the machine.

Similar letters refer to similar parts throughout the several views.

Two standards -A and A connected together by the platform B form the main frame of the machine, at the rear end of which and turning in suitable boxes a a is the main driving shaft C. The latter is cranked at Z7, the cranked portion being e1nbraced by one end of the connecting rod D the opposite end of which is jointed to a carriage E more particularly alluded to hereafter.

The driving shaft O is furnished with cam F of the form represented in Fig. 2 the said cam being arranged to bear against a roller Z which turns on a pin in the forked end of the lever Gr, the function of the lat-ter be- Specication of Letters Patent No. 30,656, dated November 13, 1860.

ing fully explained hereafter. One end of the drivlng shaft is furnished with a flywheel H and fast and loose pulleys I and I arranged in the usual manner to receive a driving shaft.

The carriage E, previously alluded to, consists of a metal plate bearing on the platform B and prevented from rising therefrom by the two guide plates J and J one of which is secured to one side frame and the other to the opposite side frame of the machine,` the guide plates also serving to maintain the carriage in its proper lateral position. On this carriage are two ribs c and e best observed on reference to Fig. 3 the outer edges of these ribs being parallel with the edges of the slides and with each other throughout their length` with the exception of a slight outward inclination y on the end of each rib. To the slide is also secured the former K the outer end of which is of the shape required for forming the inside of the bars to be bent by this machine preparatory to the compression of the bent bars into the' form of horse-shoes by a subsequent operation. The upper surface of this former K is level and parallel with that of the table this surface being continued towards the rear of the carriage where it meets an inclined or curved plane it situated at the rear of the carriage near the point where the latter is jointed to the connecting rod D. Against the top of` the former and its continuation bears the roller z' hung to the weighted arm of the lever L, the latter being secured to a spindle M the opposite ends of which turn in the opposite brackets N and N, one of which is secured to one guide J and the other to the opposite guide J.

To the outer end of the lever L is suspended the stripper P which has at its lower end two projections as seen in Fig. l the distance between these two projections being such thatone shall `pass on one rside and the other on the opposite side of a projecting continuation d of the platform which is of the same form as, but somewhat less than, the end of the former K. To the stripper P are jointed the two inclined rods Q and Q one of which is jointed to one of the brackets N and the other to the opposite bracket N the rods being so arranged in respect to the lever L and the stripper that the latter is retained in a vertical position without the aidV of guides,Y during the movement of the said lever.

R and R are two arms one of whichis hung to one of the guide plates J and the other to the opposite guide Vplate J. The inner end of each of these arms is furnished with a roller m that of one arm being avrranged to bear against the outside of one of the ribs c of the carriage E and that Yof the other arm against the loutside of the other rib e as seen in Fig. 3. The outer end of each of these arms is furnished with a roller n in the periphery of which is cut a groove for a purpose described hereaftenj T is a frame or bracket secured to the platform B by set screws passing through oblong slots in the said bracket, so that the latter can be readily adjusted at right angles to the carriage and secured after adjustnient. In a dovetailed groove in this bracket T slides the vertical knife U connected at the top to two vertical rods g g by a cross bar t, the said rods passing through and being guided by the Vbracket T and platform B below which they are connected to theV link u the latter being jointed to a bolt c which passes through an oblong opening (see Fig. 4) in the end of the short arm of the lever Gr which is hung to a projection f on the underside of the platform B.

A lower knife w (Fig. l) is secured to the platform in such a position that its edge. shall coincide with that of the upper knife U as the latter descends. To the platform (on the side opposite that to which the cutting apparatus is attached, is so secured a sto :a that it Vcan be readily adjusted.

n turning the driving shaft C in the direction of the arrow the following movements will take place; firstly, a uniform vreciprocating movement will be imparted to the carriage E its ribs e andV e and former K by the cranked portion of the shaft, and connecting rod D; secondly, an intermittent reciprocating motion will be imparted to the stripper P by the inclina* tion 7L on the carriage acting on the roller z' of the lever L, and by the falling of the weighted end of the lever on the receding of the carriage, there being a dwell or hesitation between the upward or downward motion of the stripper owing to the surface of the continuation of the former K, against which the roller i bears, being parallel to the plane in which the carriage moves; thirdly, arsimultaneous outward movement of the outer ends of the arms R andR will take place when the former K presses the heated bar againstthe rollers n and n, and a simultaneous inward movement of the saine ends of the arms when the rollers fm, fm, come in contact with the inclination y y of the ribs e and e; fourthly, the reciprocating Y movement of the knife U, caused by the cam F acting 0n the lever Gr and the latter on the link U and guide rods g g, the cam being so formed that the knife shall rise immediately after performing its duty.

The length of the bar to be bent having been determined upon the bracket T and stop are adjusted to suit that length the bolt V to which the knife U is connected being also adjusted tov its proper position in the oblong slot at the end of the lever G, when the machine is ready for operation. Supposing the carriage to be approaching the limit of its inward movement the knife U being about to descend and the stripper P being stationary in its elevated position. The attendant-takes a heated bar of the desired size andv passes it through an opening in the bracket T, see Fig. 1, and pushes it forward until its outer end touches the stop w the edge of the bar tting into the grooves of the rollers n n on the arms R and R. On the further movement of the driving shaft the knife U descends and in conjunction with the lower knife fw severs the bar at the desired point. The carriage E now moves forward its former K striking the bar in the middle and forcing the bent portion between the rollers n 'n and toward the projection d of the platform B. As the carriage continues to move forward the inclination y y of the ribs e and e come in contact with the rollers m 'm of the arms R and R causing the outer ends of these arms to approach each other and the rollers 'n n to press the bent bar against the inclined sides of the former K so thatV by the time the latter coincides with the projection d of the platform B, the heated bar has been closed tightly against the former and assumed the desired shape shown in Fig. 5. The stripper l? now descends one of its projections strikin one side and the other the opposite side of the bent iron while the projection @Z serves to resist the strain imparted to the former K as the bent iron is forced downward clear of both. The carriage with Y its former now recedes, the stripper rises and the moving partsof the machine are again in the positionrsupposed in the first instance, preparatory to the insertion of another bar of heated iron and a repetition of the above described operations.

Without enumerating the advantages of my above described machine for bending bars for horse shoes, Ait may be observed that simplicity of construction ready adjust-ment of parts as well as the ready removal and replacing of parts have been thechief points aimed at and it is believed attained.

A particular feature of the invention is the employment'ofV the grooved rollers n and n, as the grooves serve the three fold purpose of preserving the outer edges of the bar maintaining it in proper position in respect to the former K, and preventing it from warping and twisting during the operation of bending.

I do not desire to confine myself to the precise form or construction of framework. Nor do I desire to claim broadly bending bars for horse shoes over a former of the jame shape as the inside edge of the shoe,

I claim as my invention and desire to secure by Letters Patentl. The combination of the stripper P weighted lever L and carriage E the latter having a plane parallel with that in which it moves for receiving the weighted end of the lever, and the said plane terminating in an inclination t so that the said stripper may have the desired dwell between its upward and downward movement as and for the purpose herein specified.

JOI-IN MCCARTY.

Witnesses HENRY HowsoN, ROBERT HUTCHINSON. 

